Post processing techniques
This section is all abut image processing with Adobe photoshop or lightroom. Some of the principles will translate to other post-processing software.
Northern lights can add an extra dimension to night photography because they add strong colours and depth to the sky.
One of the things I love to do with recent Lightroom versions is to play with low contrast adjustments and introducing de-haze.
Although the Northern lights require a long exposure, the object is often to reduce exposure time as much as possible to achieve a usable exposure and with minimal star trails.